assertTrue(result.length() > "\"timestamp\":\"\"".length());
    }

    // Test appendException method with simple exception
    public void test_appendException_simpleException() {
        StringBuilder buf = new StringBuilder();
        Exception exception = new RuntimeException("Test error message");

        monitorTarget.appendException(buf, exception);
        assertTrue(buf.toString().startsWith("\"exception\":\""));

                break;
            case "appendException":
                appendExceptionMethod = method;
                break;
            }
        }

        assertNotNull("Should inherit append method", appendMethod);
        assertNotNull("Should inherit appendTimestamp method", appendTimestampMethod);
        assertNotNull("Should inherit appendException method", appendExceptionMethod);
    }

                return tempBuf.toString();
            }).collect(Collectors.joining(","));
            buf.append(hotThreads).append(',');
        } catch (final Exception e) {
            appendException(buf, e).append(',');
        }

        appendTimestamp(buf);
        buf.append('}');

        if (logger.isInfoEnabled()) {
            logger.info(buf.toString());
        }
    }